山东一次11月极端暴雪过程雪水比影响因子分析
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1.山东省气象防灾减灾重点实验室;2.聊城市气象局;3.济南市气象局

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山东省自然科学基金项目(ZR2022MD095);山东省气象局引导类科研项目(2021SDYD28);山东省气象局面上项目(2020sdqxm20);


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Analysis on influence factors of snow-to-liquid ratio of a snowstorm in Shandong in November
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    摘要:

    利用地面气象观测站资料、加密地面观测资料和ERA5逐小时再分析数据(0.25°×0.25°),对山东省2021年11月6—8日极端暴雪过程雪水比影响因子进行研究,结果显示:本次暴雪过程平均雪水比分布总体呈“北大南小,西大东小”分布特征,降雪初期产生的雪水比小,降雪中后期产生的雪水比大;温度偏高、云内液态水含量较高的地区雪水比较小,温度偏低、云内液态水含量较低的地区雪水比较大;雪水比与地面气温、地表温度呈负相关,地面气温与雪水比的相关性最大,积雪产生之后地表温度与雪水比变化无明显相关。

    Abstract:

    The influence factors of snow-to-liquid ratio of a snowstorm in Shandong Province from 6 to 8, November, 2021 has been analyzed by using the ground meteorological observation data, intensive ground observation data, and ERA5 hourly reanalysis data (0.25°?0.25°), and the influencing factors of the snow-to-liquid ratio were studied. Results show that: The distribution of mean snow-to-liquid ratio in this snowstorm process is generally characterized by large in the north and small in the south, large in the west and small in the east. The snow-to-liquid ratio in the early snowfall period is relatively small, while it in the middle and late snowfall period is relatively large. The snow-to-liquid ratio is smaller in the area with higher air temperature and higher specific cloud liquid water than that in the area with lower air temperature and lower specific cloud liquid water. The snow-to-liquid ratio is negatively correlated with the surface air temperature, surface temperature. The correlation between surface air temperature and snow-to-liquid ratio is the largest. After snow blanketed the ground, the surface temperature has no significant correlation with the change of snow-to-liquid ratio.

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  • 收稿日期:2023-02-23
  • 最后修改日期:2023-07-17
  • 录用日期:2023-07-18
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